Magnet device



C. F. HEINKEL MAGNET DEVICE July 1, 193o.

Filed May 17 1925 Patented July 1, 1930 CHRISTIAN F. EEINKEL, OF CLEVELAND, OHIO MAGNET DEVICE Application filed Kay 17,

My invention relates to devices in which an armature is movable in relation to the poles of a magnet device.

The outstanding object of my invention is a simple and inexpensive and eflicient magnet device in which an armature moves through a certain distance, in relation to the poles of a magnet device, by means of magnetic activity acting through a shorter distance than the travel of the armature.

One embodiment of my invention is illustrated in the accompanying drawing which shows, in a single perspective view, an electro-magnet vibrator device.

The vibrator device shown in the drawing comprises, principally, the core A, the armature B, and the coil 0.

The core A, preferably laminate as shown, has the common leg 10, the free end of which has two beveled sides in the present instance.

The core A also has the legs 11 and 12, the free ends of each also have two beveled sides in the present instance. p I

The legs are connected by the usual yoke opposite the free ends thereof.

The coil C is disposed over the leg 10 and is connected to a suitable source of electric current to alternately magnetize and demagnetize the core A. I

The armature B, shown solid in the present instance, has the grooves 13, 14, and 15. The groove 13 has two beveled sides substantially of the same bevel as the bevel on the sides of the end of the leg 10 and the grooves 14 and 35 15 have two beveled sides each substantially of the same bevel as the sides of the ends of the legs 11 and 12 respectively.

When an electric current is active in the coil C, the core A is magnetized and attracts the armature toward the poles at the beveled ends of the legs 10, 11, and 12.

In the present instance, two magnetic circuits are formed; one through the legs 10 and 11 and the other through the legs 10 and 12.

The armature B may be mounted in any suitable manner to move toward and away from the poles of the magnet A; no particular mounting is shown in the drawing.

When the core is magnetized, the two mag- 1926. Serial No. 109,805.

netic circuits attract the armature as is usual in magnet devices.

When the armature is so attracted to the core, the length of the line 16 indicates the distance which the armature has to travel before it would contact the ends of the legs whereas the length of the line 17 indicates thev distance which the magnetic lines will travel, across the air gap, to bridge the space between the ends of the legs of the magnet and the armature.

Since the line 16 is considerably longer than the line 17, it follows that the travel of the armature is considerably longer than the travel of the magnetic lines across the air l It is Well known in the art that the magnetic attraction beween two objects is increased by decreasing the air gap between them.-

In the vibrator device illustrated for instance, to which sort of devices the present invention is well adapted, it is desirable that a powerful stroke is delivered; but, in order to deliver a powerful stroke, it is necessary that the stroke is made long which. in the former devices, required a considerable amount of electric current to magnetize the core sufliciently strong to force the magnetic lines across a long air gap.

In the present invention, the stroke can be made long while the magnetic path across the air gap is short; thereby attaining a long and powerful stroke with the least amount of electric current expended for magnetizing 85 the core.

The noses 18 are provided on the ends of the armature B and project inwardly thereof to contact the abutments ,19 and deliver a blow thereon when the armature is attracted 9% toward the core but before the walls of the grooves contact the ends of the legs or before the air gap between the armature and the ends of thelegs is closed.

Since the armature is vibratory in relation to the core, it is desirable that the armature does not abut the ends of the legs to prevent upsetting of the laminations thereof.

The present invention is applicable to devices other than the vibrator device shown and described and may be modified in various ways as to the structure of the elements or the relations or arrangements thereof; therefore, without limiting myself to the precise construction and relation and arrangement of elements shown and described I claim 1. A magnet device including a core having free. end legs and bevel surfaces thereon, a magnetizing coil for said core, and an armature movable toward and away from the ends of said legs and having grooves corresponding to said ends.

2. A magnet device including a magnetizable core having a plurality of legs extending from the same, means adapted to magnetize said core and said legs, the outer ends of said legs being ree and each having more than one side thereof beveled, and an armature having grooves therein spaced according to the spacing of said legs and walls of corresponding grooves beveled according to the bevels on the corresponding legs.

3. A magnet device including a magnetizable core having a plurality of legs extending from the same, means adapted to magnetize said core and said legs, the outer ends of said legs being fr e and each having more than one side thereof beveled, the angles of all of said bevels being identical. and an armature having grooves therein spaced according to the spacing of said legs and walls of corresponding grooves beveled according to the bevels on the corresponding legs.

4. A magnet device including a magnetizable core having a plurality of legs extending from the same, means for magnetizing said ore and said legs, the outer ends of said legs being free and each having opposite sides thereof beveled, and an armature having grooves therein spaced according to the spaci? of mid legs and walls of corresponding grooves beveled according to the bevels on the corresponding legs.

A magnet device including a magnetizable core having a plurality of legs extending from the same, means for magnetizing said core and said legs, the outer ends of said legs being free and each being of a wedge form. and an armature having grooves therein spacer. according to the spacing of said legs and walls corresponding to both faces of each of said wedge shaped ends of said l gs.

6. A magnet device including a magnetizable core having a plurality of legs extending from the same, means adapted to magnetize said core and said legs, the outer ends of said legs being free and each having more than one side thereof beveled, the angles of all of said bevels being identical and having an identical relation to a. common axis, and an armature movable on said common axis and having grooves therein spaced according to the spacing of said legs and having walls corresponding to said bevels of said legs.

7. A magnet device including a magnetizable core having three legs, a magnetizing means on the middle one of said legs, the end of each of said legs having more than one beveled side. and an armature having grooves each having walls corresponding to the bevels on the corresponding one of said ends of said legs.

8. A magnet device including a magnetizable core having three legs, a magnetizing means on the middle one of said legs, the ends of each of said legs having more than one beveled side, a movable armature having grooves each having walls corresponding to the hevels on the corresponding one of said ends of said legs, and means adapted to prevent said walls of said armature from abutting said beveled sides.

9. A magnet device including a magnetizable core having three legs, a magnetizing means on the middle one of said legs, the end of each of said legs having two opposite beveled sides, the angles of all of said bevels being identical. and an armature having grooves each having walls corresponding to both bevels on the corresponding one of said ends of said legs.

10. A magnet device including a magnetiz able core having three legs, a magnetizing means on the middle one of said legs, the end of each of said legs having two opposite beveled sides, the angles of all of said bevels being identical and of identical relation with a common axis, and an armature movable on said axis and having grooves each having walls corresponding to both bevels on the corresponding one of said ends of said legs.

11. A magnet device including a magnetizable core having a plurality of legs. means adapted to magnetize said core and said legs. the outer ends of said legs being free and each having a surface of a contour other than a one plane surface. and an armature having grooves corresponding to the contour of said end surfaces.

12. A magnet device including a magnetizahle core having a plurality of legs. means adapted to magnetize said core and said le the outer ends of said legs being free, identi :al surfaces on all of said legs, each of said surfaces of a contour other than a one plane surface, and an armature having grooves corresponding to the contour of said surfaces.

CHRISTIAN F. HEINKEL. 

